Core i3-1215U vs Core i7-5820K
Aggregated performance score
Core i3-1215U outperforms Core i7-5820K by a moderate 12% based on our aggregated benchmark results.
Primary details
Comparing Core i7-5820K and Core i3-1215U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 978 | 912 |
| Place by popularity | not in top-100 | 14 |
| Cost-effectiveness evaluation | 2.82 | no data |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Alder Lake-M |
| Architecture codename | Haswell-E (2014) | Alder Lake-U (2022) |
| Release date | 1 September 2014 (9 years ago) | 23 February 2022 (2 years ago) |
| Launch price (MSRP) | $410 | no data |
| Current price | $195 (0.5x MSRP) | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i7-5820K and Core i3-1215U basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 6 (Hexa-Core) | 6 (Hexa-Core) |
| Threads | 12 | 8 |
| Base clock speed | 3.3 GHz | 1.2 GHz |
| Boost clock speed | 3.6 GHz | 4.4 GHz |
| L1 cache | 64 KB (per core) | 80K (per core) |
| L2 cache | 256 KB (per core) | 1.25 MB (per core) |
| L3 cache | 15 MB (shared) | 10 MB (shared) |
| Chip lithography | 22 nm | Intel 7 nm |
| Die size | 356 mm2 | no data |
| Maximum core temperature | 67 °C | 100 °C |
| Number of transistors | 2,600 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | Yes | No |
Compatibility
Information on Core i7-5820K and Core i3-1215U compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | FCLGA2011 | FCBGA1744 |
| Power consumption (TDP) | 140 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-5820K and Core i3-1215U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2, Intel® AVX2 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| FMA | no data | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | + |
| TSX | + | + |
| Idle States | + | no data |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Smart Response | + | no data |
| Demand Based Switching | - | no data |
| Status | Discontinued | Launched |
Security technologies
Core i7-5820K and Core i3-1215U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | + | no data |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-5820K and Core i3-1215U are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-5820K and Core i3-1215U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR4, DDR5 |
| Maximum memory size | 64 GB | 64 GB |
| Max memory channels | 4 | 2 |
| Maximum memory bandwidth | 68 GB/s | no data |
| ECC memory support | - | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® UHD Graphics for 12th Gen Intel® Processors |
| Quick Sync Video | no data | + |
| Graphics max frequency | no data | 1.1 GHz |
| Execution Units | no data | 64 |
Graphics interfaces
Available interfaces and connections of Core i7-5820K and Core i3-1215U integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Core i7-5820K and Core i3-1215U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz |
| Max resolution over eDP | no data | 4096 x 2304 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Core i7-5820K and Core i3-1215U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.1 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Core i7-5820K and Core i3-1215U.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 28 | 20 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Core i3-1215U outperforms Core i7-5820K by 12% based on our aggregated benchmark results.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
Core i3-1215U outperforms Core i7-5820K by 12% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core i3-1215U outperforms Core i7-5820K by 60% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Core i7-5820K outperforms Core i3-1215U by 11% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 6.37 | 7.12 |
| Recency | 1 September 2014 | 23 February 2022 |
| Threads | 12 | 8 |
| Power consumption (TDP) | 140 Watt | 15 Watt |
The Core i3-1215U is our recommended choice as it beats the Core i7-5820K in performance tests.
Note that Core i7-5820K is a desktop processor while Core i3-1215U is a notebook one.
Should you still have questions on choice between Core i7-5820K and Core i3-1215U, ask them in Comments section, and we shall answer.
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